diff --git a/tools/osx/libiconv_1.16_rt.patch b/tools/osx/libiconv_1.16_rt.patch
new file mode 100644
index 000000000..470f7780c
--- /dev/null
+++ b/tools/osx/libiconv_1.16_rt.patch
@@ -0,0 +1,31 @@
+diff --git a/lib/iconv.c b/lib/iconv.c
+index b7a04f8..41c5896 100644
+--- a/lib/iconv.c
++++ b/lib/iconv.c
+@@ -610,5 +610,26 @@ strong_alias (libiconv_open, iconv_open)
+ strong_alias (libiconv, iconv)
+ strong_alias (libiconv_close, iconv_close)
+ #endif
++
++#undef iconv_open
++#undef iconv
++#undef iconv_close
++
++LIBICONV_DLL_EXPORTED iconv_t iconv_open (const char* tocode, const char* fromcode)
++{
++  return libiconv_open(tocode, fromcode);
++}
++
++LIBICONV_DLL_EXPORTED size_t iconv (iconv_t icd,
++                                    ICONV_CONST char * * inbuf, size_t *inbytesleft,
++                                    char * * outbuf, size_t *outbytesleft)
++{
++  return libiconv(icd, inbuf, inbytesleft, outbuf, outbytesleft);
++}
++
++LIBICONV_DLL_EXPORTED int iconv_close (iconv_t icd)
++{
++  return libiconv_close(icd);
++}
+
+ #endif